Attachment for looms



2 I 2 Sheets-Sheet 1' INVENTOR "3 T v I A TTdRNEKS -Aug. 5 1924.

R. J. BARTHOLOMEW ATTACHMENT FOR LOOMS Filed May ,192

Aug, 5 1924. 1,503,871

R. J. BARTHOLOMEW TTACHMENT FOR LOOMS Filed May 19 1922 2 Sheets-Sheet 2 Ill lllllllflllllllllllllllll IHIHIHIIIII l ll l A TTO/(NE TES TE T

ROBERT J. BARTHOLOMEYV, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR- T0 FLETCHER WORKS,. INCORPORATED,

CORPORATION OF PENNSYLVANIA.

0F PHILADELPHIA, PENNSYLVANIA, A

. ATTACHMENT rota Looms.

Application filed May 19, 1922. Serial No. 562,047.

T 0 (LR whom it may concern:

Be it known that 1, ROBERT 'J. BARTHOLO- new. a citizen of the United States, and a resident of the city of Philadelphia, county of Philadelphia, and State of Pennsylvania,

have invented certain new and useful Im-,

provements in Attachments for Looms, of which the following is a specification.

My invention relates to attachments for looms and provides an accommodating mechanism whereby curved fabrics may be woven. r

Inasmuch asthe construction of the loom proper forms no part of the present invention I have deemed it unnecessary to illustrate the same in the accompanying drawings.

In the weaving of curved fabrics it will be readily understood that unless somespe cial mechanism is provided it will be impossible to weave such fabric and obtain the filling in radial eifect with the curve of the warp threads in the fabric. This particu lar effect is obtained by the introduction of accommodating rolls which are adjusted to take up the difference in length of the inside'and outside of the curve of the fabric between the fell of the fabric and the take up roll.

'In the accompanying drawings several.

embodiments of my invention have been illustrated. 7

Fig. 1 shows my attachment in part sectional elevation in place on a loom;

Fig. 2 is a section taken substantially on the line 2-2 of Fig. 1;

Fig. 3 is a slightly modified form of the apparatus of Fig. 2;

F'gs. a and :i-illustrate still further'modifications, Fig. 5 being a section taken substantially on the line 55 of Fig. 4; and

Figs. 6 and 7 illustrate a still further modification Fig. 7 being a plan view of the mechanism of Fig. 6.

Referring to the drawings in detail and first of all t the embodiment of my invention as illustrated in Figs. 1 and 2,1 designates the batten beam of a loom, 2 the shuttle and 3 the material being woven. The woven materialin leaving the loomis led over a small roller 6 and beneath a similar roller 7 the latter being carried by the breast beam 8. From the roller 7 the material is passed over a roller 9 and under a frame 12. These two rollers are spaced some distance apart and in plan lie parallel to each other but in side elevation they are disposed at an-angle to each other, their adjacent ends being arranged in staggered relation. For example looking at Fig. 1, the end of the roller 9 nearest the observer is lower than the opposite end which is indicated by the dotted circle 13 showing that the roller 9 is set at an angle.

It will be seen also from an. inspection of this figure that the end of the roller 10 nearest the observer is above the opposite end indicated by the dotted circle 14. It will be apparent therefore that thisroller is inclined in a direction opposed to the angle of inclination of the roller 9. For convenience I prefer to pivot one end of each roller inits respective frame as indicated at 15 in F 2, the other end being free and backed by a coil spring S. This method of mounting enables the rollers to accommo date themselves automatically to goods of different curvatures.

As Will be seen from Fig. 1 the fabric 3 lies flat upon the roller 9 as it passes over the same, the longer edge 16 of the goods passing over the high part of the roller. After leavingthe roller 9 the fabric is partially twisted and passed under the roller 10, thelonger edge 16 of the fabric travelling beneath the low end of this roller. The fabric after leaving the roller 10 passes around a tapered take up roller 17 and between it and a tapered presser roller 18 from which the fabric is discharged from the loom. a It will be seen from the foregoing that I interpose my attachment between the fell of the fabric and the take up roller for taking up the difference in length of the inside and outside edges of the fabric, and that by pivoting the rollers constituting this mechanism I am enabled to automatically change the angle of inclination of one roller to the other so as to automatically compensate for variations in the relative lengths of the inner and outer edges of the fabric being woven.

The modification shown in Fig. 3 embodies an apparatus exactly like the guiding mechanism shown in Fig. 2 with the exception that the spring S has been replaced by an adjusting screw 19 held in adjusted position by a lock nut 20.

In the embodiment of my invention shown in Figs. 4 and 5 I provide compensating mechanism of a slightly modified form. This mechanism comprises a frame 21 which may be attached to the breast beam 22 in any suitable manner and comprises side bars 23 and 24 carrying a series of compensating rollers 25 and 26. These rollers are arranged relatively to each other in a manner similar to the arrangement of the rollers 9 and 10 of Fig. 1, their adjacent ends being staggered although the rollers lie parallel when viewed in plan.

In addition to these compensating rollers I provide idler rollers 27 and 28, one at each end of the frame, 21'.

In order that this compensating mech anism may be set to accommodate fabric of different curvatures one of the rollers 26 is so mounted in the bars 23 and 24 that its angle of inclination may be varied, this adjustment being effected by means of adjusting screws 29 and 30 held in adjusted position by lock nuts 31 and 32. In this embodiment of my invention the fabric 33 passes over the idle roller 27 beneath one of the rollers 25, over one of the rollers 26, beneath the next roller 25 and so on until the entire compensating mechanism has been traversed, the fabric finally being passed around the tapered take up roller 34 and between it and the presser roller 35 from which it is discharged from the loom.

In the embodiment of my invention illustratedin Figs. 6 and 7 I provide a frame36 secured to the breast beam 37 in any suitable manner, this frame carrying a set of three wooden rollers designated 38, 39 and 40 arranged in parallel relation as viewed both in plan and elevation. Between the rollers 38 and 39 I provide a pivoted half-round non-rotatable compensating member 41 and between the'wooden rollers 39 and 40 I provide a similar metal member 42. 'One end of each of the members 41' and 42 is provided with a fulcrum 43 about which these members are adapted to pivot. These half-round metal members are set at an angle to the rollers 38, 39 and 40 as viewed in elevation, the angle of inclination of these metal members to the wooden rollers being variable by means of an adjusting screw 44. The Woven fabric 45 is passed through this mechanism, passing under the roller 38, over the half-round metal guide member 41, under the wooden roller 39, over the guide member 42, under the wooden roller 40, to the tapered take up roller 46, passing around this take up roller and between it and a presser roller 47.

It will be seen from the foregoing that I have provided compensating mechanism between the fell of the fabric and the take up roller whereby it is possible to weave curved fabrics, th difference inlength between the insidek'and outside of the curve in the fabric in the length of the fabric between the fell and the take up roller being automatically taken up.

I claim:

1. fin-attachment for looms for weaving curved woven fabrics comprising a pair of compensating rollers having their adjacent ends staggered to set the rollers at anangle to each other, said rollers being pivoted to automatically compensate for fabrics of different curvatures.

An attachment for looms for weaving curved fabrics comprising a pair of pivoted compensating rollers, the adjacent ends of said rollers being staggered to set the rollers at an angle toeach other and means for supporting the free ends of said'rollers to 7 effect a variation in the relative angle of inclination of the two rollers toaccommo date the attachment to variations in the relative length of opposite edges of the 

